Avatar: The Last Airbender
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within a volcanic caldera, where high ranking prisoners of war are kept. They find Sokka's father and Suki, the leader of the Kyoshi Warriors and Sokka's former love interest, but Zuko is quickly discovered and Azula comes to question him, accompanied by Mai and Ty Lee. Both girls eventually aid Zuko and Sokka in escaping the prison, betraying Azula in the process. Enraged, Azula demands their imprisonment and begins to slip into paranoia and insanity at the loss of her most trusted confidants and the later misguiding of her own father, Fire Lord Ozai. After regrouping, Sokka tries to create a new battle plan to defeat the Fire Lord before he can make use of the approaching Sozin's comet to empower himself and his armies (the worst case scenario the Avatar had been trying to prevent since Book One), but peace-loving Aang
refuses when they ask him to kill Fire Lord Ozai. In his confusion, he is drawn to a mysterious island and meditates on other ways to defeat Ozai by calling on the spirits of the other past Avatars for advice. Each Avatar advises him to destroy Ozai, and Aang is reluctantly resigned to killing him until he discovers that the island that he and Momo are on is really an ancient, giant, wise "lion-turtle." Aang asks it for advice, and the Lion-Turtle teaches him the ancient art of Energybending as a way to avoid killing Ozai. On the day of Sozin's Comet, Fire Lord Ozai, now the self-proclaimed "Phoenix King" harnesses the comet's incredible power to start a genocidal campaign to finally annihilate the Earth Kingdom. Princess Azula (Ozai's daughter and Zuko's sister) has come up with a plan to use the airship fleet to destroy the hope of the Earth Kingdom, thus ending it. While Aang and Momo are still missing from their own trip to the "mysterious island", Aang's friends set off to face Ozai, Azula (soon to be crowned the new Fire Lord), and the entire Fire Nation army. Zuko and Katara go to face Azula just moments before her coronation, so that he can usurp the throne in her stead; Sokka, Suki and Toph sabotage the air fleet; and the Order of the White Lotus fights to reclaim Ba Sing Se from the Fire Nation. Aang returns just in time to take on Phoenix King Ozai. Finally reclaiming his power and ability to enter the Avatar State freely, Aang (possessed by the Avatar Spirit) almost kills Ozai before restraining himself and instead calls upon the long-lost art of Energybending to remove Ozai's Firebending powers and